Let's divide 86750390 by 631
We're looking to find how many times 631 goes into 86750390.

Step 1:
631 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 631

Step 2:
The number 631 fits into 86 0 times, leaving a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Bring next digit (7) of the dividend behind the 86 and repeat the process: 867 / 631

Let's proceed to step 3:
631 goes into 867 1 times with a remainder of 236.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 631 from 867, we get 236.
Fetch the next digit (5) from the dividend, attach it to 236 and continue: 2365 / 631

Step 4:
631 goes into 2365 3 times with a remainder of 472.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Deduct 1893 from 2365 and we're left with 472.
Append the next digit (0) from the dividend to 472 and continue with: 4720 / 631

Step 5:
If we divide 4720 by 631, we get 7 and a remainder of 303.
The next digit of our result is 7. 
Result so far: 137.0
Subtract 4417 from 4720 to get 303.
Bring next digit (3) of the dividend behind the 303 and repeat the process: 3033 / 631

Moving on to step 6:
3033 divided by 631 is 4 with a remainder of 509.
Write down 4 as next digit of the result. 
Result so far: 1374.0
If we subtract 2524 from 3033, we get 509.
Append the next digit (9) from the dividend to 509 and continue with: 5099 / 631

Moving on to step 7:
The number 631 fits into 5099 8 times, leaving a remainder of 51.
Use 8 as the next digit of our solution. 
Result so far: 13748.0
Deduct 5048 from 5099 and we're left with 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 631

Step 8:
If we divide 510 by 631, we get 0 and a remainder of 510.
The number 0 becomes the next digit in our result. 
Result so far: 137480.0
Subtracting 0 from 510 leaves us with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

On to step 9:
631 goes into 5100 8 times with a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 137480.8
If we subtract 5048 from 5100, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 10:
When dividing 520 by 631, we get 0 with a remainder of 520.
The number 0 becomes the next digit in our result. 
Result so far: 137480.8
The remainder is 520 after subtracting 0 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Moving on to step 11:
When dividing 5200 by 631, we get 8 with a remainder of 152.
Write down 8 as next digit of the result. 
Result so far: 137480.808
Subtract 5048 from 5200 to get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Let's proceed to step 12:
When dividing 1520 by 631, we get 2 with a remainder of 258.
The next digit of our result is 2. 
Result so far: 137480.8082
Deduct 1262 from 1520 and we're left with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

On to step 13:
631 can be fit into 2580 4 times, resulting in a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 137480.80824
Subtracting 2524 from 2580 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 14:
560 divided by 631 is 0 with a remainder of 560.
Record the quotient 0 as the next digit in the result. 
Result so far: 137480.80824
If we subtract 0 from 560, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

On to step 15:
If we divide 5600 by 631, we get 8 and a remainder of 552.
The next digit of our result is 8. 
Result so far: 137480.8082408
Subtracting 5048 from 5600 leaves us with 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Going ahead to step 16:
If we divide 5520 by 631, we get 8 and a remainder of 472.
The number 8 becomes the next digit in our result. 
Result so far: 137480.80824088
If we subtract 5048 from 5520, we get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

The final outcome is 137480.80824088, with a leftover of 4.72e-07.